v2.4.0.8

Shareholders' Equity (Details) (USD $) | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 0 Months Ended |  | 0 Months Ended | 3 Months Ended | 9 Months Ended | 0 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Sep. 30, 2013 Change in net unrealized gains on investments [Member] | Sep. 30, 2012 Change in net unrealized gains on investments [Member] | Sep. 30, 2013 Change in net unrealized gains on investments [Member] | Sep. 30, 2012 Change in net unrealized gains on investments [Member] | Sep. 30, 2013 Foreign currency translation adjustments [Member] | Sep. 30, 2012 Foreign currency translation adjustments [Member] | Sep. 30, 2013 Foreign currency translation adjustments [Member] | Sep. 30, 2012 Foreign currency translation adjustments [Member] | Sep. 30, 2013 Preference Shares - Series B [Member] | Sep. 25, 2013 Preference Shares - Series B [Member] | Sep. 30, 2013 Preference Shares - Series B [Member] Maximum [Member] director | Sep. 30, 2013 Preference Shares - Series B [Member] Minimum [Member] | Aug. 22, 2012 Preference Shares - Series A [Member] | Sep. 30, 2013 Preference Shares - Series A [Member] | Sep. 30, 2012 Preference Shares - Series A [Member] | Sep. 30, 2013 Preference Shares - Series A [Member] | Sep. 30, 2012 Preference Shares - Series A [Member] | Sep. 30, 2013 Preference Shares - Series A [Member] Maximum [Member] director
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized (in shares) | 150,000,000 |  | 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) | 73,575,384 |  | 73,575,384 |  | 73,306,283 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | 72,613,048 |  | 72,613,048 |  | 72,343,947 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preference shares issued (in shares) | 6,000,000 |  | 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000,000 |  | 6,000,000 |  |
Preference shares, subscribed but unissued (in shares) | 3,000,000 |  | 3,000,000 |  |  |  |  |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |  |  |
Preference shares authorized (in shares) | 300,000 |  | 300,000 |  |  |  |  |  |  |  |  |  |  | 3,300,000 |  |  |  |  | 6,000,000 |  | 6,000,000 |  |
Preference shares offered (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |  |
Dividend rate of Preference Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.25% |  |  | 8.25% |  |  |  |  |
Number of Preference Shares issued (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000,000 |  |  |  |  |
Share price (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50 |  |  | $ 25.000 |  |  |  |  |
Preference shares, issuance costs (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.50 |  |  |  |  |  |  |  |
Sale price of Preference Shares (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50 |  |  |  | $ 25.00 |  |  |  |  |
Preference shares, liquidation preference per share per annum (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.625 |  |  |  |  |  |  |  |  |
Preference shares, liquidation preference per share per quarter (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.90625 |  |  |  |  |  |  |  |  |
Preference shares, liquidation preference per share in initial quarter (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.745139 |  |  |  |  |  |  |  |  |
Convertible Preference shares, Number of common shares issued upon conversion (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.0322 | 3.2258 |  |  |  |  |  |
Par value of Preference Shares (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.01 |  |  |  |  |
Preference shares, number of electable board members (in directors) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  | 2
Convertible Preference shares, conversion rate measurement period |  |  |  |  |  |  |  |  |  |  |  |  |  | 40 days |  |  |  |  |  |  |  |  |
Preference shares, dividend rate (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.09 |  |  |  |  |  |  |  |  |
Proceeds from issuance of Preference Shares |  |  | $ 0 | $ 145,041,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 145,041,000 |  |  |  |  |
Expenses and underwriting discounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,959,000 |  |  |  |  |
Preference shares, outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000,000 |  | 6,000,000 |  |
Redemption price for Preference Shares (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.000 |  |  |  |  |
Dividends on Preference shares | 3,093,000 | 0 | 9,281,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,093,000 | 0 | 9,281,000 | 0 |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | 48,025,000 | 95,552,000 | 141,126,000 | 64,051,000 |  | 49,247,000 | 93,830,000 | 143,665,000 | 63,737,000 | (1,222,000) | 1,722,000 | (2,539,000) | 314,000 |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) before reclassifications | 1,178,000 | 44,286,000 | (88,842,000) | 75,806,000 |  | 5,922,000 | 45,986,000 | (85,415,000) | 76,098,000 | (4,744,000) | (1,700,000) | (3,427,000) | (292,000) |  |  |  |  |  |  |  |  |  |
Amounts reclassified from accumulated other comprehensive income | (576,000) | (2,410,000) | (3,657,000) | (2,429,000) |  | (576,000) | (2,410,000) | (3,657,000) | (2,429,000) | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) | 602,000 | 41,876,000 | (92,499,000) | 73,377,000 |  | 5,346,000 | 43,576,000 | (89,072,000) | 73,669,000 | (4,744,000) | (1,700,000) | (3,427,000) | (292,000) |  |  |  |  |  |  |  |  |  |
Ending balance | 48,627,000 | 137,428,000 | 48,627,000 | 137,428,000 |  | 54,593,000 | 137,406,000 | 54,593,000 | 137,406,000 | (5,966,000) | 22,000 | (5,966,000) | 22,000 |  |  |  |  |  |  |  |  |  |
Less: Accumulated other comprehensive income attributable to non controlling interest | 8,000 | (13,000) | 8,000 | (13,000) |  | 0 | 0 | 0 | 0 | 8,000 | (13,000) | 8,000 | (13,000) |  |  |  |  |  |  |  |  |  |
Ending balance, Maiden shareholders | $ 48,619,000 | $ 137,441,000 | $ 48,619,000 | $ 137,441,000 | $ 141,130,000 | $ 54,593,000 | $ 137,406,000 | $ 54,593,000 | $ 137,406,000 | $ (5,974,000) | $ 35,000 | $ (5,974,000) | $ 35,000 |  |  |  |  |  |  |  |  |  |

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- Definition The number of nonredeemable preferred stock (shares) (or preferred stock redeemable solely at the option of the issuer) allocated to investors to buy shares of a new issue of preferred stock before they are offered to the public. When stock is sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the shares to the investor until it receives the entire proceeds. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss). + References No definition available. + Details
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- Definition Price of a single share of a number of saleable stocks of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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